Charles (VI) the Mad (1368–1422)

King of France from 1380, succeeding his father Charles V; he was under the regency of his uncles until 1388. He became mentally unstable in 1392, and civil war broke out between the dukes of Orléans and Burgundy. Henry V of England invaded France in 1415, conquering Normandy, and in 1420 forced Charles to sign the Treaty of Troyes, recognizing Henry as his successor.